1 /* 2 * Copyright (c) 2015, Intel Corporation 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * * Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * * Neither the name of Intel Corporation nor the names of its contributors 13 * may be used to endorse or promote products derived from this software 14 * without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /** \file 30 * \brief Alternations (foo|bar|baz). 31 */ 32 33 #ifndef COMPONENT_ALTERNATION_H 34 #define COMPONENT_ALTERNATION_H 35 36 #include "Component.h" 37 #include "position.h" 38 39 #include <memory> 40 41 namespace ue2 { 42 43 class PositionInfo; 44 45 class ComponentAlternation : public Component { 46 friend class DumpVisitor; 47 friend class SimplifyVisitor; 48 public: 49 ComponentAlternation(); 50 ~ComponentAlternation() override; 51 ComponentAlternation *clone() const override; 52 Component *accept(ComponentVisitor &v) override; 53 void accept(ConstComponentVisitor &v) const override; 54 numBranches()55 size_t numBranches() const { return children.size(); } 56 57 void append(std::unique_ptr<Component> component); 58 59 std::vector<PositionInfo> first() const override; 60 std::vector<PositionInfo> last() const override; 61 bool empty(void) const override; 62 bool vacuous_everywhere() const override; 63 void notePositions(GlushkovBuildState &bs) override; 64 void buildFollowSet(GlushkovBuildState &bs, 65 const std::vector<PositionInfo> &lastPos) override; 66 bool checkEmbeddedStartAnchor(bool at_start) const override; 67 bool checkEmbeddedEndAnchor(bool at_end) const override; 68 69 void optimise(bool connected_to_sds) override; 70 71 private: 72 std::vector<std::unique_ptr<Component>> children; 73 74 ComponentAlternation(const ComponentAlternation &other); 75 }; 76 77 } // namespace ue2 78 79 #endif 80